David Hernandez vs. Jack Rowan — Career Comparison

Jack Rowan built a career as a starting pitcher and David Hernandez as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jack Rowan posted stronger surface numbers — ERA 3.07 and WHIP 1.334 compared to 4.12 and 1.335 for David Hernandez. By the career numbers, Jack Rowan had the better of this cross-role comparison — though era context would sharpen the verdict.